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authorYu Zhao <yu.zhao@intel.com>2008-11-21 18:41:07 (GMT)
committerJesse Barnes <jbarnes@virtuousgeek.org>2009-01-07 19:13:03 (GMT)
commit3789fa8a2e534523c896a32a9f27f78d52ad7d82 (patch)
tree1bed5285a1188bf2455554118616403a8f929637 /drivers/pci/probe.c
parent0b400c7ed4d027e02f6231afa39852a2d48e6f25 (diff)
downloadlinux-fsl-qoriq-3789fa8a2e534523c896a32a9f27f78d52ad7d82.tar.xz
PCI: allow pci_alloc_child_bus() to handle a NULL bridge
Allow pci_alloc_child_bus() to allocate buses without bridge devices. Some SR-IOV devices can occupy more than one bus number, but there is no explicit bridges because that have internal routing mechanism. Signed-off-by: Yu Zhao <yu.zhao@intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/pci/probe.c')
-rw-r--r--drivers/pci/probe.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 5372d36..2ee0096 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -398,12 +398,10 @@ static struct pci_bus *pci_alloc_child_bus(struct pci_bus *parent,
if (!child)
return NULL;
- child->self = bridge;
child->parent = parent;
child->ops = parent->ops;
child->sysdata = parent->sysdata;
child->bus_flags = parent->bus_flags;
- child->bridge = get_device(&bridge->dev);
/* initialize some portions of the bus device, but don't register it
* now as the parent is not properly set up yet. This device will get
@@ -420,6 +418,12 @@ static struct pci_bus *pci_alloc_child_bus(struct pci_bus *parent,
child->primary = parent->secondary;
child->subordinate = 0xff;
+ if (!bridge)
+ return child;
+
+ child->self = bridge;
+ child->bridge = get_device(&bridge->dev);
+
/* Set up default resource pointers and names.. */
for (i = 0; i < PCI_BRIDGE_RESOURCE_NUM; i++) {
child->resource[i] = &bridge->resource[PCI_BRIDGE_RESOURCES+i];